<?php
App::uses('AppHelper', 'View/Helper');
/**
 * StringHelper class
 * @copyright 2012
 * }
 */
class StringHelper extends AppHelper {
	var $helpers = array('Html');
   
    /**
     * Smarty truncate modifier plugin
     * 
     * Type:     modifier<br>
     * Name:     truncate<br>
     * Purpose:  Truncate a string to a certain length if necessary,
     *               optionally splitting in the middle of a word, and
     *               appending the $etc string or inserting $etc into the middle.
     * 
     * @link http://smarty.php.net/manual/en/language.modifier.truncate.php truncate (Smarty online manual)
     * @author Monte Ohrt <monte at ohrt dot com> 
     * @param string $string input string
     * @param integer $length lenght of truncated text
     * @param string $etc end string
     * @param boolean $break_words truncate at word boundary
     * @param boolean $middle truncate in the middle of text
     * @return string truncated string
     */
    function modifierTruncate($string, $length = 80, $etc = '...',$break_words = false, $middle = false)
    {
        if ($length == 0)
            return '';
        // $string has no utf-8 encoding
        if (strlen($string) > $length) {
            $length -= min($length, strlen($etc));
            if (!$break_words && !$middle) {
                $string = preg_replace('/\s+?(\S+)?$/', '', substr($string, 0, $length + 1));
            } 
            if (!$middle) {
                return substr($string, 0, $length) . $etc;
            } else {
                return substr($string, 0, $length / 2) . $etc . substr($string, - $length / 2);
            } 
        } else {
            return $string;
        } 
    }
 }

?>